Unreal Engine Issues

Light does not affect landscape splines in raster pipeline (non-RT)

Crash launching project with Compat.MAX_GPUSKIN_BONES=75 and Preview Rendering set to Shader Model 5

Crash occurs when the user launches a project with a +75 bone skeletal mesh actor in their scene with the Compat.MAX_GPUSKIN_BONES=75 config change, and the default preview render is Shader Model 5. ...

[CrashReport] Assertion failed: TaskDataArray.Num() == Exporter->VolumetricLightmapTaskGuids.Num()

This is a trending crash coming out of the 4.18 Previews. Users have not provided any descriptions of their actions when the crash occurred, but at least two of the affected projects are being creat ...

Variables replaced with -1 after jumbling in details pane when one actor is selected and another blueprint compiled

Variables replaced with -1 after jumbling in details pane when one actor is selected and another blueprint compiled. De-selecting Actor_1 sets variables back to correct value when selected again. ...

Xcode 8.3.2 fails to successfully build 4.15.1 from source code

Attempting to build 4.15.1 from source code using Xcode 8.3.2 currently results in the build failing due to warnings that occur in fbxsdk, AlembicImporter, and MetalRHI. ...

Getting Vector Parameter Values from a Dynamic Material Instance with 1 or more vector parameters returns an empty array

This is not a regression. Tested in //UE5/Release-5.0 CL20979098 The array for Vector Parameters isn't getting populated when called from a Dynamic Material Instance. ...

"Working with Components on Actors Part 1" mentions incorrect behavior about adding component replaces root

In the Blueprints > Working with Components on Actors Part 1 tutorial, there are steps that say that when placing a component in an empty actor, it will replace the root component. This is old beha ...

Preview weight on Landscape Layer Sample affects Grass Output on landscape disregarding layer info

Preview weight on Landscape Layer Sample affects Grass Output on landscape disregarding layer info Repro Rate: 3/3 Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did NOT occur there ...

Launching multiple Editor processes in UE 5.5 can throw warnings due to USD Core plugin initialization

Launching multiple Editor processes at the same time with the USD Core plugin enabled can cause warnings to be logged like the following:LogUsd: Warning: Failed to update LibraryPath for USD plugInf ...

Skeletal Meshes do not work properly on Open GL ES 3.1 on Xiaomi Redmi 6

Skeletal meshes do not render or animate properly on the Xiaomi Redmi 6 (PowerVR GE8320) when using OpenGL ES3.1. This issue changed a bit from 4.19 to 4.20. In 4.19, the skeletal mesh seems to of ...